60 METEOROLOGICAL 



an extensive collection of observations illustra- 

 tive of the accuracy of the above results. 



On the 5th of December, 1822, there was a 

 slight frost in the morning, with a gentle breeze 

 from the W., the barometer at lOh. a.m. being 

 at 29.31, and the thermometer at 37^^. About 

 noon the wind shifted to the S.W., and soon 

 after passing to the S., gradually increased in 

 strength till midnight, when it blew a complete 

 hurricane. The effect on the barometer was 

 remarkable: at lOh. p.m. it had gone down to 

 28.27, which is rather more than an inch in 

 twelve hours ; the thermometer at the same time 

 standing at 43"=^. Early on the 6th, the wind, 

 which had got up to the W. by N., still blew 

 with unabated violence, and did not wholly sub- 

 side till after the break of day ; yet, at 8h. a.m. 

 the barometer had risen to 29.02, and at lOh. 

 P.M. it was at 29.40, the mercury having moved 

 through a space of 2.17 inches in 36 hours ; that 

 is, from lOh. a.m. on the 5th, to lOh. p.m. on 

 the 6th. 



An extremely high wind from the S.W. oc- 

 curred on the evening of the 3rd of December, 

 1823. The barometer, which, at lOh. a,m., was 

 at 29.10, at 12h. 30m. a.m. on the 4th, had 

 fallen to 28.32; the thermometer, during the 



